QID 216261

Date Published: 2021-05-26

QID 216261: VMware vCenter Server 6.5 Update 6.5 U3p Missing (VMSA-2021-0010)

VMware vCenter is the centralized management tool for the vSphere suite.

The vSphere Client (HTML5) contains a remote code execution vulnerability due to lack of input validation in the Virtual SAN Health Check plug-in which is enabled by default in vCenter Server. (CVE-2021-21985)

The vSphere Client (HTML5) contains a vulnerability in a vSphere authentication mechanism for the Virtual SAN Health Check, Site Recovery, vSphere Lifecycle Manager, and VMware Cloud Director Availability plug-ins.(CVE-2021-21986)

Affected Versions:
VMware vCenter Server 6.5 prior to build 17994927

QID Detection Logic (Unauthenticated):
This QID checks for vulnerable versions of VMware vCenter Server with build version using web service present on target.
QID Detection Logic (Auth):
This QID checks for a workaround in the Windows and Linux OS.
Note: We only support Linux authentication if the customer has a default bash shell assigned to the user.

Successful exploitation of the vulnerability will allow remote code execution and perform actions allowed by the impacted plug-ins without authentication.

  • CVSS V3 rated as Critical - 9.8 severity.
  • CVSS V2 rated as Critical - 10 severity.
    • Solution
    Vmware has released patch for VMware vCenter Server 6.5 , visit VMware vCenter Server 6.5 Update 3p Release Notes

    Refer to VMware advisory VMSA-2021-0010 for more information.

    Workaround:
    Affected Plugins must be set to "incompatible." Disabling a plugin from within the UI does not prevent exploitation. Please refer to KB article KB83829 for more information.

    Vendor References

    CVEs related to QID 216261

    CVE-2021-21985 | CVE-2021-21986 |
    Software Advisories
    Advisory ID Software Component Link
    VMSA-2021-0010 URL Logo www.vmware.com/security/advisories/VMSA-2021-0010.html
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